linux-kernel - Re: [PATCH RFC] reduce runqueue lock contention

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1277125479.1875.510.camel@laptop>
Date:	Mon, 21 Jun 2010 15:04:39 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Chris Mason <chris.mason@...cle.com>
Cc:	Ingo Molnar <mingo@...e.hu>, axboe@...nel.dk,
	linux-kernel@...r.kernel.org, Mike Galbraith <efault@....de>,
	Oleg Nesterov <oleg@...hat.com>, tglx <tglx@...utronix.de>
Subject: Re: [PATCH RFC] reduce runqueue lock contention

On Mon, 2010-06-21 at 12:54 +0200, Peter Zijlstra wrote:
> > It looses the ttwu task_running() check, as I must admit I'm not quite
> > sure what it does.. Ingo?

I think I figured out what its for, its for when p is prev in schedule()
after deactivate_task(), we have to call activate_task() it again, but
we cannot migrate the task because the CPU its on is still referencing
it.

I added it back, but still fireworks :-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/